Adjustable brake band for slusher hoists



Feb. 10, 1948. R. Dr ROTH 2,435,754

ADJUSTABLE BRAKE BAND FOB SLUSHER HOISIS Filed Deck-26, 1944 I I I a i)? 8 8m Aa-WORNEY Patented Feb. 19, 1948 ADJUSTABLE BRAKE BAND FOR SLUSHER HOISTS Robert D. Roth, Cleveland. Ohio, assignor, by mesne assignments, to Le Roi Company, Milwaukee, Wis., a corporation of Wisconsin Application December 26, 1944, Serial No. 569,681

3 Claims. (Cl. 188-77) The present invention relates broadly to I slusher hoists, but more particularly to a brake band which as illustrated herein may be utilized as a clutch member for a slusher hoist.

The primary object of the invention is to provide means for adjusting a brake band of a slusher hoist without materially disturbing the assembly of parts.

Another object of the invention is to provide means for compensating for the wear of a brake band for a clutch which can be accomplished without tearing down the clutch assembly or altering the normal clutch connections.

A further object of the invention is to provide a brake adjusting means which is simple in construction, efiective in operation and relatively inexpensive to manufacture.

Other objects and advantages more or less ancillary to the foregoing reside in the specific construction and aggroupment of the elements peculiar to this structure, as will become apparent from a more complete examination of the specification.

In the drawings- Figure 1 is a side longitudinal view of a hoist embodying the invention;

Figure 2 is a transverse sectional view thereof taken substantially on line 2-2 of Figure 1;

Figure 3 is a detail plan view of one of the elements of the clutch assembly;

Figure 4 is a partial side elevational view with parts in section to illustrate the position of the brake adjusting means relative to the clutch assembly. V V

Slusher hoists as presently constructed comprise a motor, a gear reduction coupled to the motor, the gears driving a pair of rope receiving drums through a pairof drums mounted adjacent thereto. In operation brake bands are employed for holding one of the drums against rotation and allowing the other drum to either remain stationary or rotate freely. The brake bands are mounted on the periphery of one of the driving drums and are operated by means of a handle. Such a band is illustrated in the present drawings and the invention is concerned with effecting a novel means of adjustment thereof.

Referring to the drawings for a more detailed description thereof, the reference numeral I represents a base frame including a pair of parallel side members II and I2 preferably made of L-shaped angle iron and secured together by any suitable means such as the cross members l3 and bolts I4. Longitudinally mounted on the frame I0 there is a hoist assembly shown to include a motor 15 and a gear reduction casing I6 united with the motor I5 through a suitable coupling I1. Projecting longitudinally away from the casing Hi there is a shaft I8 adequately journalled within longitudinally spaced bearing supports I9, 20 and 2|. Each of these supports is rigidly secured to the base frame I!) while the upper end of each support is provided with a lug 22 through which extends a tie rod 23. The side portion of each support is provided with a similar lug 24 through which extends a tie rod 25.

Rotatably mounted on the shaft l8 adjacent each bearing support [9 and 2| there is a relatively narrow drum 26 operatively associated with a similar drum 21 which in turn is interconnected with the shaft l8 by any suitable gearing in a manner to drivingly rotate the drum 21 when the drum 26 is held against rotation, and allowng the drum 21 to either remain stationary or rotate freely when the drum 2!; is free to rotate. Since the interconnecting mechanisms between the several shafts and drums above referred to form no part of this invention, no further explanation is thought necessary other than pointing out that each drum 21 is drivingly connected with a rope-winding drum 28 by any suitable means, the drum 28 being rotatably mounted on the shaft l8. It will now be understood that when the drum 26 is held against rotation both drums 21 and 28 are drivingly rotated in one or the other direction and that when the drum 26 is allowed to rotate, the drums 21 and 28 either remain stationary or are free to rotate when, for instance, subjected to the pull of the rope wound around each drum.

In order to control the rotation of each drum '26 there is provided a brake band 29 surrounding the periphery of the drum, the ends of the band being spaced one from the other at the top of the drum as clearly shown in Fig. 2. 0n opposite sides of the band 29 there is riveted or otherwise secured thereto the plates 30 and 3| which plates follow the contour of the band and extend from a point substantially in line with the tie rods 25 to the ends of the band, as more particularly shown in Figure 2 of the drawing. The plates 30 and 3| are formed of metal or similar material and mounted in superposed relation thereon isa second pair of plates 32 and 33, said last-mentioned plates being secured by means of cap screws or the like 34. The plates 30 and 3| are formed with elongated slots 35 and 36 respectively, while the plate 33 is formed with slots 31 through which the cap screws 34 are free to move, as will be hereinafter explained.

One or both of the plates 32 and 33 may be provided with means for adjusting the brake band 29 to compensate for wear thereof. deemed necessary, however, to adapt this adjusting mechanism-tote, single plate 'asiillustrated sin Figure'-2.'*andit wil"=be noted that said plate' is constructed with a portion 38 extending tangen- It is only 5 pletely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope vor-spirit .of the:inventiorvas lziereimciaimed.

LClliI-ll:

1. In mechanism of the character described, a

tially of the drum 26 and said portion is forme'dlio forum, a ra and p s t d a d t drum,

with a threaded bore 39 which carrieslan-adjusting bolt MI. The inner end'M of the bolt moves within the elongated slot 36 and is held in abutting relation with the shoulder fiz of saidi'plate.

l segmental plaiesiupon which said band is mountoe'd, "means attached to said plates for actuating said band, an intermediate plate rigid with said bandwinterposdzbetween the band and one of said The outer end of the bolt-*carries a 'lockmut w515 segmental platesgsaid intermediate plate having and head 44 normally spaced one from the'other in the manner shown.

When desiring to adjust the brake band29 to compensate for Wear, the cap screws 34 which Ta longitudinalslot formed therein, and means -lcarriedabyl-saidgiast'. named segmental plate disposed in said slot and engaging said intermediate "plate-for adjusting said band with respect to said clamp the plate 33 to the plate 3| are first loosened last named segmentaliplate.

" andlithen lthet'lo'bkinut 53 is i also l-oosenedrtafter whioh'i a suitable -tool-"is:"app i'ed to-the head M i an'dlthe rb 'o'lt' '40: a vancedrinwardlynto elevate". the t-brakeibandiinto closer 'engajgementwith-the drum 2.'iZIn': mechanism ofithe";character-idescribd, a :drum; abrakeYbandpositioned;aroundisaididrum, Psegmentalplatessupon'whicnzsaidzbandlismounted, meanstattachedi-zto saidtplatesffforiactuatlng 113. .iAs-the'.bolt' is-advancedi it carries with it the :saidxband; an:intermediate'oplatetrigid;"withz'said fplate 3 l ifthei-platel 33" being held stationary due Tit-oti'ts connection with vthe brake band and 'cutch ctuating mechanism to be hereinafter; more fully r es'cr h d. hMovem'ent' of the:p1ate: 3 I": relative-to u b'andidnterposed between'rithe bandia-nd one'z'of 'Isaid isegmental '2 plates,: said intermediate plate having a longitudinal slot formed 'Jtherein,:-:said .ilastnnamed segmental platechavingralportion exttherplate 33Siszaccomplishedbyreasonof thesl'ots'i3oztendin tangentially: of ithe'tband :afidl means 31. :After':the.;adjustment :has: been: effected, :the can :screws 34 areittightened: so" :as to clamp the plat-ES on Ctheplate 3 hand ithelockin'ut. istightnwithin sai'd extending: portion: guided in zsaidvslot randzrengagingisaidintermediate platezl'for: adjusting said:ban -iwithlrespecttltossaid;iastmamed ened; against. the plate 3 I ."ithereby" retaining the "segmental plate.

-severaltparts inzth'eir"adjustedrposition. 35 1.3.; Inumechahismsbf the:lcharacteridescribdsa EThetmeatnsforieactuatinglthef brake baridtcom- 'idrum a brakesbandtpositionediaroundsaid:drum, fprises aflink fi'pivoted at oneiend ifi to: arrear segmental plates uponwhichsaiwbandiissmount- 41 ek e d from the "plate 32, while the ODP red; 'meansrattached'l toi-zsaid; plates: for actuating te end of saidr' linkris b v iy connected as rzs'aid'band, an intermediatefplate:rigidfwithlsaid i ldicatedzetJBJbetWeQn'fthe" hifurc'ated'rends la 240 :band.interposed ."between; aidf-rbandz-andionei'of c ofi the leVeri 5i 'iThe 'bifurcated endiof "the lever zsaid: segmental "plates, zsaid:.:.intermediaterplate i:sismivotallvioonnected asindicated at? 5 I" toit-he ;:haViI1g'1 a 1 longitudina1;'s1ot (formed litherein; said ear 521'extendingmpw rdly: from iaaridforming a last named segmental plate havingsalportiomexpart" oft he1plateZ-33. tDownward pressure on"ithe tending tangentially of saidbandp'and ansadjustlever.'50 brings the "en'dstof'ithe:brake -band'to- 45'iing screw in saidtiextendingmortion guide'd in gether ?aboutffthe'peribherytoffthe?drumi26-while said slot and engaging;saidfjntermediatet' plate flupward ipressure thereon?separates? thesends v'in for adjusting said :band:witlr'respectitofzsaidi last a*man-ner welliknowninithisart. namedzsegmentalplate. LFrom'the abOVe' description when taken -in*con- 'L-ROBERT D.2ROT.H. 'ilne ction' "with" the :accomp anying' drawing; itwill 5 l be readily-apparent that there has been provided "REFERENCES" CITED fa means for compensat theweal The'followingreferences are 'ofwecorddnthe b'and without tearing down the clutch assembly m of this: n

-;UNITED-: STATES l PATENTS ormaterially=altering the normal' clutch: connections. "The adjustment can be'fiected in a minimum amount of time -by*ana'dju'stment'that' is Number Name Date simple in construction andrelativelyinexpensive 115233712 'Pr'oben 'Jan.-20,"1925 '-'-tomanufacture. 1,945,166 5 Snee'd -*Jan. '30,' 1934 Although theforegoing-description is neces- 669,962 Letts .3 May=13, 1902 sarily of a detailed'charaetenin"orderto-"com 560 2,055,330 Bbld Sept. 2211936 

